Safety guard for buffing machines



J. M. KELLY SAFETY GUARD FOR BUFFING MACHINES I Dec. 13, 1949 FiledMarch 22. 1947 KKK CIDDDCIUDUDDDDOIUCIDUD OC 22222222 2 2 2 2 2 22 22 22 22 2 2 5 22 2 u .2 2 n. 22 m 2 2 man/70R JOHN -/l Z K540 ATTOR/Vf)Patented Dec. 13, 1949 SAFETY GUARD FOR BUFFJNG- :MAGH N-ES' John M.Kelly, Adria-n, Mich, 'ass'ig nor-t'o Gerity- Michigan Corporation,Adrian, Mien, a. com

poration of Michigan Application March .22, 19412,,Ssrial3151a. tsetse 1This invention relates :to a bufling wheel safety guard andasserxibledmechanism for use prefer- .jabl y'with pneumatic systems inwhich the dust suitably removed and I provide means to stop and collectany article '(if dropped out of the buffers hands) thereby avoidingpossible injury to the workmemthe guard also acting to preventdustfumes, etcetera, from being directed toward the workmen.

Incertain types of buffingwheels, the actual huffing material on therevolving wheel wears relatively :rapidlyand my invention provides meansto readily and accuratelyadj'u-st and keep in setposition the buflingguard of my invention in, proper position in the mechanism.

Further objects and advantages are within the scope of this inventionsuch as relate to the arrangement, operation and function of the relatedelements of the structure, to various details of construction andtocombinations of parts, elements per se, and to economies of manufactureand numerous other features as will "be apparent from a consideration ofthe specification and drawing of a form of the invention, which may bepreferred, inwhich:

Figure I is a top plan view of one embodiment of guard screen;-

Figu-re II is a top plan view of the same installed in the channels forsupporting the same in the hood of the buffer mechanism;

Figure III is a rear side elevational view of the mechanism installedwith the buffing wheel and hood parts broken awayto illustrate theconstruction;

Figure IV is a side elevational view of the asly with partsbroken awayto. show the op ating mechanism;

Figure V is a front elevational view of the removable drawer at. thebottom-of the hood; and

Figure. lZI. an elevational view partlysection of thegearingmechanismior adjusting the guard screen. .01, plate,

As shown in Figure 'IV', my present invention includes an adjustableguard ID for use. assembled in the dust hood .l2 which surrounds theibuffing wheel 14, driven in. the direction, of the arrow l5. Connectedwith hood [2 is a pneumatic duct I6, through which dust from the buffingoperation is drawn by the blower system (not shown).

As stated above, the present invention is intended to be applied tomachines for buffing plated material such as chrome plated articles ofall kinds including those of various shapes and sizes, some of which arerelatively small and if 5 Claims. (Cl; Bi -238 the operator drops one ofthe pieces, the guard ill will} prevent the same from being carriedaround by wheel .HI and thrown out through thetop of, the hood I? whichmight fly right into the operators face who is standing facing the wheelI l. -Moreover, as" the material on the huffing wheel is continuallywearing, it is necessary to adjust the guard- W toward the center of thewheel as thediameter thereof decreases due to such wear, which in someinstances may be relatively rapid.

In'Fig'ureI, I show the guard l0 detached from the'mechani-sm, and inthis instance the same comprises a frame I58 to which is attached the orchannel inons and '23 located at an angle as tin-dieated in Figure "IV.The guard l0 slides in these angle plates. any position of adjust- ;mentasdctermined by theradjusting mechanism. Asdndicated in II, I provide apair of transverse braces 24 and 25 connected with the angle and 23 togive rigidity to the .asis'emhl-y of thetmechanism in the hood l2.

. Asmdieated in Figure. I, the guard It is provided with a series .oflongitudinally arranged openings 28 and 29; on the. opposite sides ofthe guard tooperateas gear-racks with which a pair (of gears Mend: shownin Figure VI, are fixed rotatable-shaft 33, and are adapted; to co 7operate and operate said racks :218 and 29 on the guard ill..Asindicated in Figure VI, the ,Shfilftffi iis.rotatablysupportedinbearings 34 and 35, supportedontthe underside of angle pieces :23 land;22'. shaft, 33 extending. outside of the bnmnghoodlir and havingconnected on its outer extremitythe worm wheel 3:6. It will thus be seenthat by providin g =mea-ns to rotate the shaft zts'ithrough the wormwheel the gears :30 and :31 acting through the racks 29 and 28 willslide the guard eta-in rthe'zchannels' tz and -23:1to. any

position desired.

So that the operator may readily adjust the guard, I provide on theoutside of the hood a worm 38 carried by worm shaft 39 which is suitablymounted in brackets 40 and ll to the outside of the hood 12 as indicatedin Figures III and IV. The upper end of the worm shaft 39 is providedwith an operating handle 43 extending may be made so that the parts willautomatically stay in any particular position of adjustment due to thefriction, and yet on the other-hand,-

the adjustment of the position of the guard plate or screen may be madeto a fine degree as may be required.

As indicated in Figures 1V and V, the bottom of the hood I2 is providedwith the sliding drawer 45 having a suitable handle 46 so that the samemay be pulled outwardly to retrieve any small articles that may havebeen dropped by the operator, carried around by the bufiing wheel 14 tohit the guard Ill and drop down the hood l2 and into the sliding drawer45. It will be understood that the mesh of the screen on g the guard I0is made relatively small but of a very strong Weave so as to effectivelydivert any articles down the hood I2 into the drawer 45 and as stated asolid plate 20 may be used.

I claim:

1. A buffing wheel guard in combination with a hood and pneumatic dustremoving system, comprising a guard supporting means secured within thehood rearwardly of the buffing wheel,

a guard located within said hood and supported by said means; atransverse rotatable drive shaft located within said hood and extendingoutside thereof; gearing between said shaft and said guard adapted tooperate and move said guard to various positions of adjustment; a gearfixed to said transverse shaft and located outside said hood; acooperating gearing and shaft mounted on the outside of the hood forturning said transverse shaft, said shaft extending to the top of thehood; and a means connected with the upper end of said shaft whereby theoperator may operate the mechanism to adjust said guard in said hood.

2. A buffing wheel guard in combination with a hood and pneumatic dustremoving system,

comprising a guard supporting means secured within the hood below thecenter of and rearwardly of the buffing wheel axis, a guard locatedwithin said hood and supported by said means; a transverse rotatabledrive shaft located within said hood and extending outside thereof;gearing between said shaft and said guard adapted to operate and movesaid guard to various positions of adjustment; a friction gear meansfixed to said transverse shaft and located outside the hood; acooperating gearing and shaft mounted on the outside of the hood forturning said transverse shaft, said mechanism operating to maintain saidguard in set position of adjustment.

3. A buffing wheel guard in combination with a hood and pneumatic dustremoving system, comprising a guard supporting means secured within thehood below the center of and rearwardly of the buffing wheel axis, aguard located within said hood and supported by said means; a transverserotatable drive shaft located within said hood and extending outsidethereof; gearing between said shaft and said guard adapted to operateand move said guard to various positions of adjustment; a gear fixed tosaid transverse shaft and located outside the hood; a cooperatinggearing and shaft mounted on the outside I of the hood for turning saidtransverse shaft;

said hood extending to the floor; and a removable drawer at the bottomof said hood for receiving articles directed downwardly of said hood bysaid guard.

, 4. A bufing wheel guard in combination with a hood and pneumatic dustremoving system, comprising a pair of rails adapted to be secured withinthe hood below the center of and rearwardly of the bufiing wheel axis, aguard having parallel gear racks on opposite sides, said sides locatedwithin said rails; a transverse shaft; gears carried by said shaftadapted to operate said racks and move said guard; a worm wheel fixed tosaid transverse shaft located outside the hood; a worm and worm shaftmounted on the outside of the hood for turning said worm wheel, saidworm shaft extending to the top of the hood; and a crank handleconnected with the upper end of said shaft whereby the operator mayadjust said guard within said hood. 5. A buffing wheel guard incombination wit a hood and pneumatic dust removing system,

comprising a pair of rails adapted to be secured within the hood belowthe center of and rearwardly of the bufiing wheel axis, a guard havingparallel side members; a series of holes in said :members adapted toconstitute gear racks; on opposite sides of said guard, said sidemembers REFERENCES CITED The following references are of record in thefile of this patent:

UNITED STATES PATENTS Number Name Date 333,478 Parks Dec. 29, 18851,694,340 Weinland Dec. 4, 1928 2,225,225 McElevey Dec. 17, 1940 FOREIGNPATENTS Number Country Date 4,7 39 Great Britain 1910 19,892

Sweden Dec. 9, 1904

